STUDY ON COSEISMIC DEFORMATION OF WENCHUAN EARTHQUAKE BY USE OF L AND C WAVEBANDS OF SAR DATA
Jiang Mi 1) ;Ding Xiaoli 2) ; Li Zhiwei 1,2) ; Zhu Jianjun 1) ; Yin Hongjie 1) ; and Wang Yongzhe 1)
1)School of InfoPhysics and Geomatics Engineering, Central South University, Changsha 4100832)Dep. of Land Surveying & GeoInformatics, The Hong Kong Polytechnic University, Hong Kong
Abstract：It describes the results of the ground motion monitoring over Wenchuan earthquake sites in the southwest of China with the ALOS PALSAR and ENVISAT ASAR sensors based on the differential interferometric synthetic aperture radar (DInSAR) technique. In recent the Cband data were mainly used to detect the ground deformation, but the results of interferometry are limited by high vegetated areas and rugged terrains. The study purpose is to demonstrate that these constraints decrease significantly at Lband data due to its spatial resolution and the longer wavelength. The real and simulated data also show Lband data sets are more appropriate for detecting the deformation over the rugged terrain and high vegetation area. Especially, for the large deformation gradient area, PALSAR images are not likely to generate interferometric phase aliasing which goes against the phase unwrap.
Jiang Mi ,Ding Xiaoli ,Li Zhiwei et al. STUDY ON COSEISMIC DEFORMATION OF WENCHUAN EARTHQUAKE BY USE OF L AND C WAVEBANDS OF SAR DATA[J]. jgg, 2009, 29(1): 21-26.
